brightness setting backup

rc.local

cheng@ada ~ $ cat  /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
echo 766 > /sys/class/backlight/intel_backlight/brightness
rfkill block bluetooth
exit 0